In the driving in of the staple it is obvious that the wood is compresed between the diverging inner edges 17 of the legs 8 and 9, assuring a good firm hold on these legs, while the serrations on the outer edges 16 of the legs, which remain in substantially parallel relationship, further insure a good hold in the wood. In some cases crow-bars are used to equal advantage. 5, the block indicated at 22 providing a suitable abutment for the other end of the hammer head in such an operation. 4, the leg 20 of the T 11 being narrow enough to fit between the claws 21 of a hammer for withdrawal of the staple, as shown in FIG. In operation, the T-shaped head 11 i large enough to enable driving the staple in with a hammer H, as seen in FIG.
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